Carrier 38AUZ appendix Convenience Outlets, Units Without Factory-Installed Disconnect, All units

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leads according to required operation of the convenience outlet. If an always-energized convenience outlet operation is desired, connect the source leads to the line side of the unit-mounted disconnect. (Check with local codes to ensure this method is acceptable in your area.) If a de-energize via unit disconnect switch operation of the convenience outlet is desired, connect the source leads to the load side of the unit disconnect. On a unit without a unit-mounted disconnect, connect the source leads to the factory connection leads (pigtails) in the unit’s main control box (see Fig. 8).

All units except 208/230-v units are factory wired for the voltage shown on the nameplate. If the 208/230-v unit is to be connected to a 208-v power supply, the control transformer must be rewired by moving the black wire with the ¼-in. female spade connector from the 230-v connection and moving it to the 208-v¼-in. male terminal on the primary side of the transformer. Refer to unit label diagram for to line-side information. Field power wires will be connected line-side pressure lugs on the power terminal block or at factory- installed option non-fused disconnect.

Field power wires are connected to the unit at the leads to the factory connection leads (pigtails) in the unit’s main control box (see Fig. 8) or at factory-installed option non-fused disconnect switch. Max wire size is #4 AWG (copper only).

NOTE: TEST LEADS - Unit may be equipped with short leads (pigtails) on the field line connection points on the optional disconnect switch. These leads are for factory run-test purposes only; remove and discard before connect- ing field power wires to unit connection points.

FIRE HAZARD

Failure to follow this warning could result in intermittent operation or performance satisfaction.

Do not connect aluminum wire between disconnect switch and condensing unit. Use only copper wire.

(See Fig. 7.)

ELECTRIC

DISCONNECT

SWITCH

COPPER

WIRE ONLY

ALUMINUM

WIRE

Fig. 7 — Disconnect Switch and Unit

Units Without Factory-Installed Disconnect —

When installing units, provide a disconnect switch per NEC (National Electrical Code) of adequate size. Disconnect sizing data is provided on the unit informative plate. Locate on unit cabinet or within sight of the unit per national or local codes. Do not cover unit informative plate if mounting the disconnect on the unit cabinet.

Units with Factory-Installed Disconnect —

The factory-installed option disconnect switch is located in a weatherproof enclosure located under the main control box. The manual switch handle is accessible through an opening in the access panel.

All units -

All field wiring must comply with NEC and all local codes. Size wire based on MCA (Minimum Circuit Amps) on the unit informative plate. See Fig. 8 for power wiring connections to the unit power terminal block and equipment ground.

Provide a ground-fault and short-circuit over-current protection device (fuse or breaker) per NEC Article 440 (or local codes). Refer to unit informative data plate for MOCP (Maximum Over-current Protection) device size.

Splice Terminals

(field supplied)

BLK

YEL

BLU

DISCONNECT

Ground Lug

LEGEND

Factory Power Connection Lead

Field Power Supply Conductor

Fig. 8 — Power Wiring Connections

All field wiring must comply with the NEC and local requirements.

Affix the crankcase heater warning sticker to the unit disconnect switch.

Convenience Outlets —

ELECTRICAL OPERATION HAZARD

Failure to follow this warning could result in personal injury or death.

Units with convenience outlet circuits may use multiple disconnects. Check convenience outlet for power status before opening unit for service. Locate its disconnect switch, if appropriate, and open it. Tag-out this switch, if necessary.

Two types of convenience outlets are offered on 38AUZ models: Non-powered and unit-powered. Both types provide a 125-volt GFCI (ground-fault circuit-interrupter) duplex receptacle rated at 15-A behind a hinged waterproof access cover, located on the end panel of the unit. See Fig. 9.

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Contents Contents Safety ConsiderationsInstallation Guideline Replacement /Retrofit R22 to Puron38AUZ*07-14 Unit Dimensions Compressor Unit Size 38AURefrigerant Type Condenser FansNominal Capacity kW Operating Weight kg Aluminum-Fin Coils StandardPressurestat Settings kPa High Cutout Operating Charge, Typical kg† Shipping Charge kgType of Coil Service OptionsModel Type Refrigerant OptionsInstallation Liquid Line Data 38AUZ*07-14 60 Hz Units Refrigerant Piping Sizes 38AUZ*07-14 60 Hz UnitsComplete Electrical Connections Install AccessoriesField Power Supply Refrigerant Specialities Part NumbersConvenience Outlets Units Without Factory-Installed DisconnectUnits with Factory-Installed Disconnect All unitsUnit Connect Primary Transformer Installing Weatherproof CoverConnections Terminals Weatherproof Cover Installation ThermostatElectrical Data 38AUZ*07-14 Hz Units START-UP PRE-START-UPSystem Check Advanced Scroll Temperature Protection Label 38AUZ*07 Charging Chart 38AUZ*14 Charging Chart Operating Sequence Routine System MaintenanceBase Unit Controls Comfort Alert Diagnostic Module ServiceInput LED Status Codes LockoutCompressor Protection Cadm TroubleshootingLubrication Field Refrigerant Access Ports Novation Coil Cleaning and MaintenanceRepairing Novation Condenser Tube Leaks Factory High-Flow Access PortsCompressor Stops on HIGH-PRESSURE Switch TroubleshootingProblem Solution Compressor does not RUN Fastener Torque ValuesUnit Operates TOO Long or Continuously Problem Solution Compressor Cycles on LOW-PRESSURE SwitchCompressor Running but Cooling Insufficient System is NoisyAppendix Catalog No 38AU-01SI Preliminary Information CUT Along Dotted Linecut Along Dotted Line

38AUZ specifications

The Carrier 38AUZ series is a line of air conditioning systems specifically designed to deliver optimal comfort and energy efficiency for both residential and commercial applications. Known for their advanced technology and robust performance, these units are ideal for a variety of climate conditions, ensuring consistent cooling and heating throughout the year.

One of the standout features of the Carrier 38AUZ series is its inverter technology, which allows the unit to adjust its cooling or heating output in real-time based on the ambient conditions. This results in lower energy consumption and reduced operating costs, making the system not only environmentally friendly but also budget-conscious. By minimizing temperature fluctuations, the inverter design promotes a more stable and comfortable indoor environment.

The 38AUZ units are equipped with high-efficiency compressors that enhance the system’s performance. These compressors operate quietly and efficiently, contributing to a lower noise level that is ideal for residential settings. Furthermore, they come with variable speed fan motors which offer precise airflow control, allowing users to customize their comfort level while ensuring energy savings.

In terms of build quality, the Carrier 38AUZ is constructed using durable materials designed to withstand harsh weather conditions. Its compact design allows for easy installation and maintenance, making it an ideal choice for urban environments where space is limited. Additionally, the system features a corrosion-resistant cabinet that extends its lifespan and maintains aesthetic appeal.

The 38AUZ series also includes a range of advanced control options. Users can benefit from smart technology integration, allowing for remote temperature control and scheduling through mobile devices. This feature not only enhances convenience but also provides users with complete control over their energy usage.

Moreover, the Carrier 38AUZ units come with various capacity options, catering to different space requirements. With a focus on energy efficiency, these systems often meet or exceed industry standards, including SEER ratings, ensuring optimal performance without sacrificing energy consumption.

In summary, the Carrier 38AUZ series is an exemplary choice for anyone looking to invest in a reliable, efficient, and advanced air conditioning system. With its inverter technology, high-efficiency compressors, smart control options, and durable construction, the 38AUZ not only delivers exceptional comfort but also promotes energy conservation, making it a smart choice for sustainable living.
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